maint:Don't translate debug level logs

Our translation policy
(https://wiki.openstack.org/wiki/LoggingStandards#Log_Translation) calls
for not translating debug level logs. This helps to prioritize log
translation.
There were some commits that fixed it but ignored the the style like
msg = _('this is debug info'); LOG.debug(msg)
This commit fixes this style of LOG.debug.

Change-Id: I2cc3fe563456ba0906f74262ab1ba6967301d6d1
Remove unused db.api.flavor_extra_specs_get_item

Change-Id: I5fc89d35820ffc5a77e2152ba1bfa3b82474be89
Merge "maint:Don't translate debug level logs"
Merge "Remove unused db.api.flavor_extra_specs_get_item"